Hacker News Reader

Pretty sure residential 3-phase in Europe is 400V phase-to-phase, it's 220V phase-to-neutral.

It's 220/240 volt RMS to neutral, which is about 312 volt maximum to neutral at the top of the phase.

make that 230V (min.) or rather 240V (nominal).

230V nominal in EU

You're right, though tolerances allow for up 253V since 2009. I usually measure between 235V and 242V from the wall.